What’s the worst amount of body damage/bondo you discovered after you bought the car??

When I was younger I bought a car in the rain and knew better. For weeks I had been passing a 1975 red Firebird, white interior with added the shaker hood scoop for sale backed into a driveway. I wanted it and went to look at it while it was raining. I know not to look at a car in the rain but I bought it on the spot. I drove it a few weeks and brought it to a garage for a new exhaust system. That's when the mechanic told me the car almost fell off the lift because the sub frames were completely gone. Closer inspection and the quarters were all Bondo as were the bottom of the doors etc. Lesson learned.